CN109946079B - Friction and wear testing machine for water-lubricated sliding bearing - Google Patents
Friction and wear testing machine for water-lubricated sliding bearing Download PDFInfo
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- CN109946079B CN109946079B CN201910192462.0A CN201910192462A CN109946079B CN 109946079 B CN109946079 B CN 109946079B CN 201910192462 A CN201910192462 A CN 201910192462A CN 109946079 B CN109946079 B CN 109946079B
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- 238000012360 testing method Methods 0.000 title claims abstract description 81
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 238000007789 sealing Methods 0.000 claims description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000005461 lubrication Methods 0.000 description 15
- 238000005259 measurement Methods 0.000 description 9
- 238000001514 detection method Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
A friction and wear testing machine for a water-lubricated sliding bearing. The test device comprises a spindle motor, a spindle seat, a test cavity, a test force loading mechanism and a hydraulic station, wherein a spindle coaxial with the spindle motor is arranged in the spindle seat, a dynamic torque sensor is connected between the spindle and the spindle motor, a bearing sample seat is arranged in the test cavity, a shaft sample with a hollow shaft structure is coaxially arranged in the bearing sample seat, two ends of the shaft sample penetrate through two side walls of the test cavity respectively, one end of the shaft sample is detachably connected with one end of the spindle, a slip ring is arranged at the end part of the other end of the shaft sample, an ultrasonic sensor and a pressure sensor are arranged on the inner wall of the cavity of the shaft sample, wiring of the ultrasonic sensor and the pressure sensor is led to the outside of the test cavity through the slip ring, the test force loading mechanism comprises a force application seat and a hydraulic actuator, the force application seat is positioned in the test cavity, one end of the force application seat is in contact with the outer circle of the bearing sample seat, the other end of the force application seat is connected with the hydraulic actuator, and the hydraulic actuator is supplied with oil by the hydraulic station.
Description
Technical Field
The invention relates to a friction and wear testing machine for a water-lubricated sliding bearing, which is mainly used for testing the comprehensive performance of the water-lubricated sliding bearing and belongs to the technical field of testing machines.
Background
Bearings are widely used in industry as key components in mechanical transmissions. The load, the rotating speed and the temperature of the bearing are different under different working conditions and can be influenced by various impurities, so that the design and the lubrication mode of the bearing need to be correspondingly adjusted according to different working environments. The traditional bearing lubrication mostly uses oil as a lubricating medium, a large amount of petroleum resources are consumed, and the bearing is sealed for preventing leakage, so that the bearing structure is complex. In order to overcome the waste of oil lubrication bearings on resources and the pollution to the environment, water lubrication bearings using water as a lubricating medium are also appeared at present. Compared with an oil lubrication bearing, the water lubrication bearing has the characteristics of simple structure, cleanness, environmental protection, low cost and the like. The water film thickness is an important parameter affecting the service life and the running performance of the water lubricated bearing, so that the detection of the water film thickness is an important detection parameter when the bearing is comprehensively tested. The test requires that the test water pressure can reach a high pressure lubrication environment of 3MPa, and the thickness and the pressure of the water film are measured in a dynamic running state.
In the prior art, a sliding bearing testing machine is mostly adopted for testing the performance of the sliding bearing, but the sliding bearing testing machine in the prior art cannot meet the test requirement of the water lubrication sliding bearing, cannot effectively measure the thickness and the pressure of a water film, and meanwhile, has large friction coefficient measurement error due to large resistance of a sealing system of the traditional sliding bearing testing machine.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the friction and wear testing machine for the water-lubricated sliding bearing, which can meet the test requirement of the water-lubricated sliding bearing and has high measurement precision.
The invention is realized by the following technical scheme: a friction and wear testing machine for a water-lubricated sliding bearing is characterized in that: the ultrasonic testing device comprises a spindle motor arranged on a motor seat, a spindle seat arranged on a base, a testing cavity, a testing force loading mechanism and a hydraulic station, wherein a spindle coaxial with the spindle motor is rotatably arranged in the spindle seat through a bearing, a dynamic torque sensor is coaxially connected between the spindle and a motor shaft of the spindle motor, the testing cavity is fixed on the base, a testing liquid inlet and a testing liquid outlet are arranged on the testing cavity, a bearing sample seat is arranged in the testing cavity, a shaft sample is coaxially arranged in the bearing sample seat, the shaft sample is a hollow shaft, two ends of the shaft sample penetrate out of two side walls of the testing cavity respectively, one end of the shaft sample is detachably connected with one end of the spindle, the end part of the other end of the shaft sample is provided with a sliding ring, two ends of the shaft sample are respectively sealed with the two side walls of the testing cavity through a stainless steel rotary shaft seal, a position on the inner wall of the cavity of the shaft sample, which corresponds to a bearing sample seat, the position of the bearing sample seat is provided with a pressure sensor and a force application mechanism, the force application mechanism is arranged on the outer circle of the bearing sample seat, the force application mechanism is in the hydraulic testing device, the force application mechanism is connected with the hydraulic station through the outer circle of the bearing seat, and the force application mechanism is in the hydraulic station, and the hydraulic station is in contact with the force application mechanism.
When the high-pressure lubrication device works, high-pressure water is filled in the test cavity through the high-pressure water pump, so that a high-pressure lubrication environment is maintained in the test cavity. The sliding bearing sample for test is sleeved outside the shaft sample and is arranged in the bearing sample seat. The spindle motor rotates to drive the shaft sample to rotate, and the force application seat is driven by the hydraulic actuator to load test force on the sample. The dynamic torque sensor is used for friction torque measurement, the thickness of a water film between the shaft sample and the sliding bearing sample is measured through the ultrasonic sensor arranged on the inner wall of the shaft sample, and the pressure at the water film is detected through the pressure sensor. According to the invention, the stainless steel rotary shaft seals are adopted at the two ends of the shaft sample for high-pressure dynamic seal, the linear speed of the seal is up to 30m/s, the friction resistance is 1/15 of that of a common rotary oil seal, the seal pressure can be up to 5MPa, and the high-precision friction torque measurement under the high-pressure lubrication state and the high-rotation speed state can be simultaneously satisfied.
Furthermore, the front end of the short-range piston of the hydraulic actuator is provided with a Y-shaped rotary axial sealing ring for sealing. By adopting the Y-shaped rotary axial sealing ring for sealing, the sealing pressure is up to 5MPa, high-pressure water in the test cavity can be effectively prevented from leaking to the hydraulic actuator, and the sealing resistance is 1/30 of that of a common O-shaped ring.
Further, the stainless steel rotary shaft seal is a PTFE stainless steel rotary shaft seal.
The beneficial effects of the invention are as follows: the invention can meet the test requirements of the comprehensive performance test of the water lubricated sliding bearing, such as high pressure lubrication environment, high load loading, high precision friction coefficient measurement, water film thickness and pressure in a dynamic running state. The water pressure in the test cavity can reach 3MPa high pressure, so that the requirement of a high-pressure lubrication environment is met; the hydraulic actuator is used for loading by using a high-pressure oil cylinder, so that the stable large-load loading requirement can be realized; the high-pressure dynamic seal adopts a PTFE stainless steel rotary shaft seal, the linear speed of the seal is up to 30m/s, the friction resistance is 1/15 of that of a common rotary oil seal, the seal pressure is 5MPa, the high-pressure lubrication state and the high-rotation speed state can be simultaneously satisfied, the high-precision friction torque measurement can be realized, and the measurement precision can be greatly improved; through adopting hollow axle sample, the installation of realization ultrasonic sensor that can be convenient and pressure sensor to convenient realization is to the measurement of water film thickness and pressure, draws forth test cavity outside with ultrasonic sensor and pressure sensor's wiring through adopting the sliding ring, has avoided the interference between wiring and the pivoted axle sample, guarantees that the testing machine reliable operation. The shaft sample adopts a detachable connecting structure, and the size of the sample can be changed so as to test samples with different diameters.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
in the figure, 1, a base, 2, a hydraulic actuator, 3, a short-range piston, 4, a Y-shaped rotary axial sealing ring, 5, a force application seat, 6, a slip ring, 7, a shaft sample, 8, a test cavity, 9, a test liquid inlet, 10, a sliding bearing sample, 11, an ultrasonic sensor, 12, a bearing sample seat, 13, a test liquid outlet, 14, a pressure sensor, 15, a stainless steel rotary shaft seal, 16, a main shaft, 17, a main shaft seat, 18, a dynamic torque sensor, 19, a main shaft motor, 20, a motor seat, 21 and a hydraulic station.
Detailed Description
The invention is further illustrated by the following non-limiting examples, in conjunction with the accompanying drawings:
as shown in the drawing, the friction and wear testing machine for the water-lubricated sliding bearing comprises a spindle motor 19 arranged on a motor base 20, a spindle base 17 arranged on a base 1, a testing cavity 8, a testing force loading mechanism and a hydraulic station 21. The spindle seat 17 is rotatably provided with a spindle 16 through a bearing, the spindle 16 and the spindle motor 19 are coaxially arranged, a dynamic torque sensor 18 is coaxially connected between the spindle 16 and a motor shaft of the spindle motor 19, the dynamic torque sensor 18 is in the prior art, and the model of the dynamic torque sensor adopted in the embodiment is Beijing three-crystal JN338. The test cavity 8 is fixed on the base 1, the test cavity 8 is provided with a test liquid inlet 9 and a test liquid outlet 13, a bearing sample holder 12 is arranged in the test cavity 8, and the bearing sample holder 12 is fixed on the side wall of the test cavity through a locating pin. The bearing sample holder 12 is internally and coaxially provided with a shaft sample 7, the shaft sample 7 is a hollow shaft, two ends of the hollow shaft respectively penetrate through two side walls of the test cavity 8, one end of the shaft sample 7 is detachably connected with one end of the main shaft 16, and the end part of the other end of the shaft sample 7 is provided with a slip ring 6. The two ends of the shaft sample 7 are respectively sealed with the two side walls of the test cavity 8 through stainless steel rotary shaft seals 15. The position on the inner wall of the cavity of the shaft sample 7, corresponding to the position on the bearing sample holder 12, where the sliding bearing sample 10 is installed, is provided with an ultrasonic sensor 11 and a pressure sensor 14, where the ultrasonic sensor 11 and the pressure sensor 14 are all in the prior art, the type of the ultrasonic sensor adopted in this embodiment is OLYMPUS-V111-10MHz, the wiring of the ultrasonic sensor 11 and the pressure sensor 14 leads to the outside of the test cavity 8 through the slip ring 6, the slip ring 6 is in the prior art, and is a rotary communication device, and is mainly used for transmitting power and data signals between a fixed structure and a rotating structure during continuous rotation, and the type of the slip ring 6 adopted in this embodiment is: MG056-S06-3000RPM. The test force loading mechanism comprises a force application seat 5 and a hydraulic actuator 2, wherein the force application seat 5 is positioned in the test cavity 8, one end of the force application seat 5 is in contact with the outer circle of the bearing sample seat 12, the other end of the force application seat 5 is connected with a short-range piston 3 of the hydraulic actuator 2, and a Y-shaped rotary axial sealing ring 4 is arranged at the front end of the short-range piston 3 for sealing. The hydraulic actuator 2 is fixedly arranged on the base 1, and the hydraulic actuator 2 is supplied with oil by the hydraulic station 21.
The invention is used for testing the comprehensive performance of the water-lubricated sliding bearing. When the invention works, high-pressure water is filled in the test cavity 8 through the high-pressure water pump, so that the test cavity 8 maintains a high-pressure lubrication environment of 3 MPa. The slide bearing sample 10 for test is fitted outside the shaft sample 7 and mounted in the bearing sample holder 12. The spindle motor 19 rotates to drive the shaft sample 7 to rotate, and the hydraulic actuator 2 drives the force application seat 5 to load test force on the sample. Friction torque measurement is performed by the dynamic torque sensor 18, the water film thickness between the shaft sample and the slide bearing sample is measured by the ultrasonic sensor 11, and the pressure at the water film is detected by the pressure sensor 14.
Other parts in this embodiment are all of the prior art, and are not described herein.
Claims (3)
1. A friction and wear testing machine for a water-lubricated sliding bearing is characterized in that: including setting up spindle motor (19) on the motor cabinet, spindle support (17), test cavity (8), test force loading mechanism, hydraulic pressure station (21) of setting up on base (1), be provided with in spindle support (17) through the bearing rotatablely with spindle motor (19) coaxial main shaft (16), main shaft (16) with between the motor shaft of main shaft motor (19) coaxial coupling has dynamic torque sensor (18), test cavity (8) are fixed on base (1), be equipped with test liquid inlet and test liquid outlet on test cavity (8), be provided with bearing sample seat (12) in test cavity (8), be provided with axle sample (7) in the bearing sample seat (12) coaxial, axle sample (7) are the hollow axle, two lateral walls of its both ends wear out respectively test cavity (8), one end of axle sample (7) with one end detachably of main shaft (16) is connected, the other end of axle sample (7) is provided with sliding ring (6), both ends of axle sample (7) pass through two rotatory seal of axle sample (8) respectively, the device is characterized in that an ultrasonic sensor (11) and a pressure sensor (14) are arranged on the inner wall of a cavity of the shaft sample (7) corresponding to the position, on the bearing sample seat (12), of the bearing sample, wiring of the ultrasonic sensor (11) and the pressure sensor (14) is led to the outside of the test cavity (8) through the slip ring (6), the test force loading mechanism comprises a force application seat (5) and a hydraulic actuator (2), the force application seat (5) is positioned in the test cavity (8), one end of the force application seat (5) is in contact with the outer circle of the bearing sample seat (12), the other end of the force application seat (5) is connected with a short-distance piston (3) of the hydraulic actuator (2), and the hydraulic actuator (2) is fixedly installed on the base (1) and is supplied with oil by the hydraulic station (21).
2. The water lubricated sliding bearing frictional wear testing machine according to claim 1, wherein: the front end of a short-range piston (3) of the hydraulic actuator (2) is provided with a Y-shaped rotary axial sealing ring for sealing.
3. The water lubricated sliding bearing frictional wear testing machine according to claim 1, wherein: the stainless steel rotary shaft seal is PTFE stainless steel rotary shaft seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910192462.0A CN109946079B (en) | 2019-03-14 | 2019-03-14 | Friction and wear testing machine for water-lubricated sliding bearing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910192462.0A CN109946079B (en) | 2019-03-14 | 2019-03-14 | Friction and wear testing machine for water-lubricated sliding bearing |
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| Publication Number | Publication Date |
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| CN109946079A CN109946079A (en) | 2019-06-28 |
| CN109946079B true CN109946079B (en) | 2023-11-28 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110954427B (en) * | 2019-12-18 | 2021-01-26 | 武汉理工大学 | Multifunctional miniature precision bearing experiment platform |
| CN111157377B (en) * | 2019-12-31 | 2023-10-20 | 中钢集团邢台机械轧辊有限公司 | Roller roughness retention testing machine |
| CN111649941A (en) * | 2020-06-12 | 2020-09-11 | 上海大学 | Multifunctional sliding bearing friction wear testing machine |
| CN112444352B (en) * | 2020-11-10 | 2022-08-09 | 北京动力机械研究所 | Airtight and frictional force combined testing device for high-temperature dynamic seal |
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